Fix smtp

[kay0u]

Problem

• #247 #246

Solution

• Replace 127.0.0.1 by the domain
• enable starttls because, why not?

fix #247 fix #246

PR Status

• [ ] Code finished and ready to be reviewed/tested
• [ ] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

[OniriCorpe]

@kay0u it doesn't seems fixed :/ https://forum.yunohost.org/t/smtp-error-vaultwarden-invite-user/28080

[kay0u]

This fix has been merged in testing, not in the master branch yet :)

[isAAAc]

is it related to #254 ?
if yes, as mentionned in, testing branch doesn't fix the issue